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Title: Seismic stratigraphy, facies architecture, and reservoir character of a pleistocene shelf-margin delta complex, Eugene Island Block 330 field, offshore Louisiana

Abstract

The GA interval of the Eugene Island Block 330 field is the deposit of late Pleistocene ({approximately}0.8 Ma) shelf-margin lowstand delta complex. We integrated three-dimensional (3-D) seismic, wireline log, core, and cuttings data to examine the delta`s internal architecture and to reconstruct its depositional history. This interval displays a complex vertical and lateral interfingering of channel, clinoform, and base-of-slope failure deposits over short distances (a few kilometers), and is the product of delta lobe progradation structural development (growth faults, rollover anticline) and relative sea level change. We then integrated our sequence stratigraphic interpretation with production data. Hydrocarbon accumulations in the interval are primarily associated with updip facies (delta mouth bar, delta front) beneath the flooding surface at the top of the interval, and not the sequence boundary at the base of the interval. Maps of seismic amplitudes associated with the top of the GA interval show patchy (mouth bar deposits) and curvilinear (interdistributary delta front) trends that indicate reservoir heterogeneities associated with depositional features. There is a good qualitative relationship between seismic amplitude and production characteristics, with the best production being from high-amplitude areas that sit high on the structure.

Authors:
 [1];  [2];  [3]
  1. Pennsylvania State Univ., Socorro, NM (United States)
  2. Chevron USA Inc., Perth (Australia)
  3. New Mexico Bureau of Mines and Mineral Resources, Socorro, NM (United States)
Publication Date:
OSTI Identifier:
460009
Resource Type:
Journal Article
Journal Name:
AAPG Bulletin
Additional Journal Information:
Journal Volume: 81; Journal Issue: 3; Other Information: PBD: Mar 1997
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; 58 GEOSCIENCES; LOUISIANA; OFFSHORE SITES; SEISMIC SURVEYS; RESERVOIR ROCK; GEOLOGIC MODELS; PETROLEUM DEPOSITS; EXPLORATION; PLEISTOCENE EPOCH

Citation Formats

Hart, B S, Sibley, D M, and Flemings, P B. Seismic stratigraphy, facies architecture, and reservoir character of a pleistocene shelf-margin delta complex, Eugene Island Block 330 field, offshore Louisiana. United States: N. p., 1997. Web.
Hart, B S, Sibley, D M, & Flemings, P B. Seismic stratigraphy, facies architecture, and reservoir character of a pleistocene shelf-margin delta complex, Eugene Island Block 330 field, offshore Louisiana. United States.
Hart, B S, Sibley, D M, and Flemings, P B. Sat . "Seismic stratigraphy, facies architecture, and reservoir character of a pleistocene shelf-margin delta complex, Eugene Island Block 330 field, offshore Louisiana". United States.
@article{osti_460009,
title = {Seismic stratigraphy, facies architecture, and reservoir character of a pleistocene shelf-margin delta complex, Eugene Island Block 330 field, offshore Louisiana},
author = {Hart, B S and Sibley, D M and Flemings, P B},
abstractNote = {The GA interval of the Eugene Island Block 330 field is the deposit of late Pleistocene ({approximately}0.8 Ma) shelf-margin lowstand delta complex. We integrated three-dimensional (3-D) seismic, wireline log, core, and cuttings data to examine the delta`s internal architecture and to reconstruct its depositional history. This interval displays a complex vertical and lateral interfingering of channel, clinoform, and base-of-slope failure deposits over short distances (a few kilometers), and is the product of delta lobe progradation structural development (growth faults, rollover anticline) and relative sea level change. We then integrated our sequence stratigraphic interpretation with production data. Hydrocarbon accumulations in the interval are primarily associated with updip facies (delta mouth bar, delta front) beneath the flooding surface at the top of the interval, and not the sequence boundary at the base of the interval. Maps of seismic amplitudes associated with the top of the GA interval show patchy (mouth bar deposits) and curvilinear (interdistributary delta front) trends that indicate reservoir heterogeneities associated with depositional features. There is a good qualitative relationship between seismic amplitude and production characteristics, with the best production being from high-amplitude areas that sit high on the structure.},
doi = {},
journal = {AAPG Bulletin},
number = 3,
volume = 81,
place = {United States},
year = {1997},
month = {3}
}